"The Messenger of Allah ﷺ stood among us and said: 'One thing does not infect another.' So a Bedouin said: 'O Messenger of Allah! If a camel gets mangy glands and we leave it at the resting place of camels, then all of the camels get mange?' The Messenger of Allah ﷺ said: 'Who caused the first to get mange? There is no 'Adwa nor safar. Allah created every soul, so he wrote its life, its provision, and its afflictions.'" Note: The majority of scholars interpret this to mean that these things in and of themselves do not transmit or cause harm through supernatural or hidden means but that Allah is ultimately in control and any fearful superstition around these is false.  

قَامَ فِينَا رَسُولُ اللَّهِ ﷺ فَقَالَ لاَ يُعْدِي شَيْءٌ شَيْئًا فَقَالَ أَعْرَابِيٌّ يَا رَسُولَ اللَّهِ الْبَعِيرُ الْجَرِبُ الْحَشَفَةُ نُدْبِنُهُ فَيُجْرِبُ الإِبِلَ كُلَّهَا فَقَالَ رَسُولُ اللَّهِ ﷺ فَمَنْ أَجْرَبَ الأَوَّلَ لاَ عَدْوَى وَلاَ صَفَرَ خَلَقَ اللَّهُ كُلَّ نَفْسٍ وَكَتَبَ حَيَاتَهَا وَرِزْقَهَا وَمَصَائِبَهَا  

[Machine] The Messenger of Allah صلى الله عليه وسلم stood among us and said, "Nothing happens due to predestined measures, meaning, nothing one does, nor any sickness, nor any relief, nor any loss, except that it has been pre-destined by Allah, and Allah has recorded the measurement of that for every creation. The Bedouin stood up and said, 'O Messenger of Allah! Does taking precautions benefit in anyway against the disease, or is it merely a means of earning livelihood?' The Messenger of Allah صلى الله عليه وسلم replied, 'What has ever been written is decreed and nothing can change it, except du'a (supplication). No sickness shall befall except with Allah's leave. Therefore, seek Allah's protection from it, but do not expose yourself unnecessarily to it."  

قَامَ فِينَا رَسُولُ اللهِ ﷺ فَقَالَ لَا يُعْدِي شَيْءٌ شَيْئًا لَا يُعْدِي شَيْءٌ شَيْئًا لَا يُعْدِي شَيْءٌ شَيْئًا فَقَامَ أَعْرَابِيٌّ فَقَالَ يَا رَسُولَ اللهِ النُّقْبَةُ مِنَ الْجَرَبِ تَكُونُ بِمِشْفَرِ الْبَعِيرِ أَوْ بِذَنَبِهِ فِي الْإِبِلِ الْعَظِيمَةِ فَتَجْرَبُ كُلُّهَا؟ فَقَالَ رَسُولُ اللهِ ﷺ فَمَا أَجْرَبَ الْأَوَّلَ؟ لَا عَدْوَى وَلَا هَامَةَ وَلَا صَفَرَ خَلَقَ اللهُ كُلَّ نَفْسٍ فَكَتَبَ حَيَاتَهَا وَمُصِيبَاتِهَا وَرِزْقَهَا  

[Machine] The Messenger of Allah ﷺ said, "Nothing passes by chance, nothing passes by chance." He said this three times. Then an Arab man stood up and said, "O Messenger of Allah, sometimes a camel's hump is infected and it affects the whole herd." The Prophet ﷺ remained silent for a while, then he said, "The first statement was not our doing, there is no contagion, no owl, and no bad omen. Allah created every soul and recorded its lifespan, its death, its afflictions, and its sustenance."  

قَالَ رَسُولُ اللهِ ﷺ لَا يُعْدِي شَيْءٌ شَيْئًا لَا يُعْدِي شَيْءٌ شَيْئًا ثَلَاثًا قَالَ فَقَامَ أَعْرَابِيٌّ فَقَالَ يَا رَسُولَ اللهِ إِنَّ النُّقْبَةَ تَكُونُ بِمِشْفَرِ الْبَعِيرِ أَوْ بِعَجْبِهِ فَتَشْتَمِلُ الْإِبِلَ جَرَبًا قَالَ فَسَكَتَ سَاعَةً ثُمَّ قَالَ مَا أَعْدَى الْأَوَّلَ لَا عَدْوَى وَلَا صَفَرَ وَلَا هَامَةَ خَلَقَ اللهُ كُلَّ نَفْسٍ فَكَتَبَ حَيَاتَهَا وَمَوْتَهَا وَمُصِيبَاتِهَا وَرِزْقَهَا  

[Machine] An Arab came to the Prophet ﷺ and said, "O Messenger of Allah, the disease called Nukbah affects camels. It spreads to all the camels, causing them to have blisters." The Prophet ﷺ replied, "Who caused it first? It affects their lives, their calamities, and their sustenance."  

جَاءَ أَعْرَابِيٌّ إِلَى النَّبِيِّ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ النُّقْبَةُ تَكُونُ بِمِشْفَرِ الْبَعِيرِ أَوْ بِعَجْبِهِ فَتَشْتَمِلُ الْإِبِلَ كُلَّهَا جَرَبًا فَقَالَ رَسُولُ اللَّهِ ﷺ «فَمَنْ أَعْدَى الْأَوَّلَ؟ حَيَاتُهَا وَمُصِيبَاتُهَا وَرِزْقُهَا»